Transmission mechanism



Sept. 2, 1930. R. PETIT I TRANSMISSION MECHANISM Filed Jan. 15. 1928 -4 sheets-sheet 1 Sept. 2, 1930. n PETIT v 1,174,843

- TRANSMISSION MECHAN'ISM .med Jan. 13. 1928 4 Sheets-Sheet s Sept. 2, 1930. R. PETIT 1,774,843 I TRANSMISSION MECHAINISM Filed Jan. 15. 1928 4 Sheets-Sheet 4 EH]!! 'iiilllllllllmmw" Patented Se t. 2, 1 930 r UNITED ST TES] PATE-Pg'r. OF ICE.

Bantam) PETIT, or rams, rmcn, assmnon 'ro socIErrE anonrmr. raangarsn nrrn: nmcnnn, ANCIENNE uarsonsrmm," or rama -rnmcn rnmsmssr'on rincmmsu a lic tion and January 13,1928, serial No. 246,597, and France April 1 1, 192?.

. For the purpose; of fixing in any angular position a. panel oscillating around an axis on whiclfit is pivoted it is necessary to employ various mechanical means, either for maintaining. the panel itself in the desired osit'ion or for making it integral with its axis of oscillation; the actual control of the angular movement-of the said panel must therefore be followed by the manipulation or positionworking of the windscreen or sun-shade of.

ing of the fixm means, which requires time and may be pre udicial when forexample the vehicles is involved.

For the purpose of effecting the one-way locking of the control of the angular move-.

ments of such panels, a-device has been used COIilPllslllgJl worm acting on a plnlon-lntegral-with the panel,but this device, although vantages above referred to by permitting the 'control of the angular movements of the said angular displacement.

-' inte ral. 1

it ensures suiiicient one-way locking, presents the disadvantage of re uinng'a long time for.

manipulation, when t e angular movement controlled is considerable. According to the present invention the method of controlling movements'of pivoted panels consists .in dispensing with the'disadpanels without high reduction gearing'whil'st ensuring the one-way. locking of the system,

by interposing on the transmission 'ear, be-

ctween the working mechanism and-t epanel to be moved, any suitable apparatus so that 'the movements-imparted to the working mechanism are directlytransmitted to the panel controlled,-but thatpthe forces exerted on the. panel itself are powerless to eflect its The present invention also has for its object anlapplian ce enabling the process according to the invention to be carried into effect.

' In the accompanying drawing;

Fig. 1 shows a perspective and diagram-' 'embodimentof the.dr1ving shaft.

matically the manner in which the. process efiect by a direct control of therotation of the axis of oscillation with which the panel is all F1g. -2 shows diagram in perspec- F a (I acts on the panel itself and comprises {interposed transmission gear.

Fig. 3 is a longitudinal section on the line III'-III of Fig. 5, of ah embodiment of the ,one-way locking c ontrol device as applied to "wind-screens. I H y Fig. 7 1s a cross section on the lme VII- 55 VII ofFig. 6, of the above mentioned control device. K r l j Fig. -8-shows in perspective the method of applying the device according to the invention to the control ofthe brake gear of motor vehicles.

. "Fig.-8"",is a perspective view'jof the-method I of applyingthe transmission system accord ing to the invention to the remote control of the angular movements'ofthe lamps of ve hicles. g

Fig. 9 shows in section, ona plane perpendicular to the axis'of rotation, on'the line v IX'IX of Fig. 10, a rotary mechanical device for oneway locking transmission in two 30 directions. 4

Fig. 10 is a section same device, on the line X-X' of Fig. 9.

Fig. 11 is a erspectiveiview of an embodiment ofthe drlven shaft. f

Fig. .12 is also a perspective view of the whole of the lockingmechanism of the device,

the pivoting rollers being removed to enable the drawing 0 be more easily understood.

- Fig. 13' shows thestationary' box, on the walls of which the locking mechanism acts.

Finally Fig.- 14 is a perspective view ofan a As shown diagrammatically "n Fi s. land 2, each device for carrying the met 0d into 05 tive, the general embodi out o the process locking-device formed'in such a manner that according to the invention, when the control it is adapted totransmit to the secondary the through the axis of the secondary consists of the axis 3 of oscillation rotary movementswhich it receives from the primary, but opposes any rotatory movements of the secondary resulting from any force ap lied to thepanel controlled.

n Fig. 1 the primary consists of a shaft 1 adapted to receive a rotary 'movement by means, for example, of the lever 2, and the of the controlled panel 4, the said axis being adapted to revolve in bearings 5.

T e system which is shown in Fig. 1 is applicable in the case where the one-Way locking device 6 is inserted directly between the primary shaft 1 and the secondary shaft 3 which isthe axis of oscillation of the panel 4, i. e. in thissy'stem, the angular movements of the control ed panel 4 are solely determined by the rotation of the shaft 3 with which the panel is integral.

The one-way locking device 6' being constructed in such a manner that it fulfills the conditions set forth above and being integral with a fixed part of the frame or chassis on and tending to rotate same beinglnullified' by a clamping action set up in the. one-way locking device Fig. 2 shows diagrammatically an apparatus likewise enabling the object of the invention to be carried into effect, but which differs from that shown in Fig. 1 in that the primary shaft 1 does not act on the axis of oscillation 3 of the panel 4, but that the rotary movements of a secondary shaft 7 are transmitted to the panel by means of trans- 'missien gear for controlling the oscillations 'of the anel. This device may be speciallyapplie in a large number of cases and the transmission gear, referred to above, may be of any kind.

The one-way lockin device 6 must be characterized y the act that the rotary movements, -of an direction or amplitude imparted to the primary shaft roduce rotations in the same direction an. of the same amplitude of the secondary shaft, whilst the action of a couple, applied to one direction orthe other on the secondary shaft, effects no angular dis lacementwvhatever of either shaft the devlce fulfilling these conditions therefore imparts .absolute one-way lockin to the drive, irrespective of the direction 0 the latter. v The embodiment of the invention shown in Figs. 3 4, and 5 corresponds to the arrangement shown diagrammatically in Fig. 2, an

intermediary coupling connecting the panel and the secondary.

In this embodiment, the one-way locking device 6 is located in a socket '9 fixed to the frame 10 ofthe wind-screen by means of a bracket, screwed on tothe said wing screen 7 and integral with the socket 9; the primary shaft 1 can be .turned freely in the socket 9 i by acting on the handle 12 and it imparts its rotary movement to the secondary shaft 7 by the drive of the tongue 13 engaging between the side walls 14 of a slot cut in the primary shaft. The spindle 15 holds thetwo shafts in engagement and its withdrawal enables the device to be dismantled; a spring 16 located between the socket 9 and the primary shaft and of which the ends are engaged between the two shafts (Fig. 4) prevents the reversing of the drive in the known manner by ressing against the internal walls of the soc (et.

The secondary shaft 7 is connected to the panel to be worked by means of a knucklejointed connecting rod 17.

It will be evident that such a device perof angular movements of the panel 4 round the axis of rotation .3, whilst no-force' applied in any direction on the panel 4 produces any'angular movement of the main shaft, owing to the interposition of the one-way mits the control, by acting on the handle 12,

locking device; the one-way locking of the system is therefore perfectly ensured;

In the embodiment shown in Figs. 6 and 7, the general arrangement isthe same but the transmission rod is replaced by a pinion 18, keyed onto the secondary. shaft and in engagement with atoothed sector 19 integral with the panel 4 and adapted to turn round the same axis of oscillation; in this case the control handle for the rotation of the primar shaft is replaced by a button 20;

T e embodiments WhlOll have just been described are only cited by way of example, and it is to be understood that the invention is in no Way confined to them.

It should likewise be pointed out that inthe embodiments described the actuating gear (handle, lever, fly-wheel, etc.) is directly fixed onto the primary shaft of the one-way locking device; it will be evident that in the case where it is desired to arrange for remote control of the wind-screen movements, the angular movements of the primary shaftcan be produced bya relay of any kind or by means of a mechanical. pneumatic or electric coupling or the like.

It will be understood that the rotary oneway locking devices which are utilized in the various embodiments of the invention maybe of any type, either known or new and will be chosen solely for their suitability in this connection, the invention residing not in ,the actual construction of these devices themselves,

but in their special application to thecontrol of oscillating panels.

As shown in Fig. 8 the irreversible transmission device according to the invention is likewise applicable to brake gear 'or motor vehicles. In this'case, the operatinglever 45' is made integral with the primary shaft 1 whose angular movements are transmitted directly.

to the driving member or crank arm 46 of the brake 47, inte a1 with the secondary shaft 3,

by means of t e one-way lockingdevice 6 in'- serted between'the primary and the secondary shaft and fixed on a member, 48 integral with the-chassis of the vehicle.

The application of the transmission device to the control of brake gear enables the ratchet or like mechanism generally used for fixing the operating levers. in all their angular positions, to be dispensed with, such mechanism necessitating a supplementary action on the part of the driver of the vehicle a rotary oneway locking device being inserted between the operating lever and the control member of the brake gear, whereby the reactions of the brakes on the said gear cannot be transmitted to the lever 45.

As in the'case of application to the operation of oscillatingpanels, it will be understood that the rotary one-way locking devices employed in the controlling ofbrakes, may be of I any type, known or new, the invention residobject of this invention, to the-remote control of the movements of vehicle lamps, shows a ing, not in 'theactual arrangement of these devicesthemselves, but in their special application to the working of the oscillating panels. However, in the majority of cases it will be found preferable to use as'this transmission gearone ofthe devices constitut'ng the object of this invention and which is shown v in Figs. 9, 10,11,12, 13 and 14, which, con- 40 solidity and greater precision in working than those devices which comprise resilient sisting only of rigid members, oifersgreater parts such as springs. Fig. S 'whichrefers to the application of the method. of irreversible transmission, the

special embodiment of this application.

In .this casethe lamp' bracket 49 fixed/for exam le, to any integral part of the chassis by a 'ing' plate 50, carries anupright rod 51' on which may rotate a-socket 52 integral with the bearings 53 of the counter-shaft 3, fixed to the body of the lamp.

A rotary one-way locking device 6, integral with the socket 552 is inserted between the counter-shaft 3 and the primary shaft 1, the

rotation of the latter being controllable by a flexible. shaft 54 orv by any other suitable member.

plane are effected by rotation of the socket-52 on the redo-1, the said-socket being adapted to be on the rod by tightening the screw 55. Thd'movfements ofthe lamp 'in the vertical .The movements of thelampinthehorizontal .ed on a rigid lane may be controlled from the drivers seat y acting on the flexible shaft 54, thereby producing the rotation in'the required direction lamp. y

It is evldent that any movements in the vertical plane which the vibrations or the movements of the chassis might tend to impart to thelamp will be locking device.

. As in the case of the receding applications the-rotary one-way loc adopted in lamp movement control may be of prevented by the one-way any known or new type, the invention resid-- ing in the application of these devices to this of theprimary shaft 1 and in consequence that. of the secondary shaft 3 integral with the ng devices which are i control which may be carried out not only in the vertical plane but also in any other desired plane. At any rate the device shown on,

suitably shaped for this purpose; these twolevers pivot on a common free trunnion 29' and are separated by a suflicient distance to enable. them to oscillate slightly on the I said trunnion.

At their ends nearest tothe inner wall of the box and at their faces opposed to that on which the trunnion 29 bears,'the levers 26 and 27 pivot respectively'on free trunnions 30 and3l, on which rest, on the other hand, thefree segments 32 and 33 the outer cylindrical curvature of which is the same as that'of the e interior Walls of the box 23 and which pivot,

at their other end on the free trunnion 34.

The centres of the three trunnions 29, 30

and 31 form the vertices of an'isosceles triangle of which the apex 29 is located between which joins the centres of the trunnions 30 and 31 26 and 27 but permit a slight separation of theselevers'; the sector 35 is fixed'o'n a plate the-axisof rotation of the device and the line Y In the hollow central space present between -the segments 32 and 33 and the lovers 26 and 27 is located the sector 35 having a slot of which theasides 36 and -37 enclose the levers' i v 38 which bears normally'on the segments 32 i and 33 and which can turnfreely in the box- 23 and which is integral with the driven'shaft' i The shaft 39 is carried in a bearing mount part oftheldevice support, for a i example the' te40. v f r Theaxes o the two shafts 21 and 39 are'in loo -32 and 33) by the p anes 36 and 3 (for the shaft 39) theseacting respectively for separating and drawing together the free ends of the levers 26 and 27, irrespectively of the direction of rotation.

, When an angular movement is imparted to the driving shaft 21 in one or the other direction, the tenon 25,'acting on. one or other of the levers 26 and 27 and being between these levers, se arates t e lower arms which 1 causes, by osciation on the trunnion 29, the

upper arms to be drawn together and the separation of thesegment-s from the inner walls of the box 23; the locking gear can then turn freely in the box and carry with it the driven shaft 39 by the action of one of the lovers 26 or 27 on one of the sides 36' or 37 of the slot in the sector 35. f Y a On the other hand, if a couple is applied to the shaft 39 to effect its rotation in one direction or the other, one of the sides 36 or 37 bears outwardly on the lever corresponding thereto and causes the deformation of the triangle 29,30 and 31 and the separation of the two trunnionsiiO- and 31 which tightly press vthe plate the se ments 32 and 33 against the inner wall of theiiox 23th'ereby preventing any rotation of the locking gear and, in consequence, of the shafts 21 and 39 integral in rotation with this gear through the tenon 25'and the sector 35. m

The segments 32 and 33 carry, on the side where they contactwith the plate 24, grooves 41 and 42 of any suitable section'in which engage the tenons 43 and 44, integral with 24, the dimensions of these tenons being such that whilst permitting the necessai'y movements of the segmentsytheylimit '.the relative movements of the locking mechanism and the carrier plate and provide for the carrying along ofthe segments in the general rotary movement, as soon as the unlocking has been effected. The same device or a gsimilar device may be applied in apparatus adapted to rotateat high speed, to counteract the effect of centrifugal forces acting on the segments.

The device according to the invention therefore forms a one-way locking control system, as any reaction ten ing to produce r01 .tation' of the driven shaft in'eit-her direction,

(ii therefore be applied to all mechanisms in if it is not balanced by acorresponding force onthe driving shaft, causes the locking of the device, which locking is the more pronounced the greater the force applietl to. the driven shaft. v p

The device according to the invention may are independent both of the shaft' or aircraft, clutches of machines, hoisting;

appliances, sighting apparatus of' ordnance and in machine tools in general, this enumeration being, however, merely byway of indication and in no way limitative. Finally it will be understood that modifications inthe dimensions and in the respective connections of the various elements may be made in the device according to the invention without effecting its characteristic features. The present invention has for its object 1.. Irreversible bi-directional transmission device comprising a fixed casing having an interior cylindrical bearing surface, a driving shaft journalled in one end of said casing, coaxially with said bearing surface, a plate on said driving shaft within said casing, a pair of segments loosely mounted on said plat having exterior faces with a cu'r-, vaturc corresponding to that of said bearhingedly movable at one pair of their adjacent ends, and of such length as to leave a gap between their remainin ends, the ends of said segments at said gap eing niirmally symmetrical with respect to a diameter passing through the axis of said driving shaft and the axis of the hinge movement between said segments, a pair of levers also arranged symmetrically with respect to said diameter and hingedly movable relative to the .ends of said segments adjacent said gap, a free'trunnion embraced between said levers having its axis normally lying on that side of the shortest line between the axes of hinge movement between said segments and levers, which is toward the axis of the driving shaft, said trunnion providing a shifting, fulcrum for said levers, said driving shaft plate being formed eccentrically with a projection extending between said levers, with play, intermediate the free trunnion and the axis of said driving shaft, for selectively swinging either of said levers, depending upon the direction in which'said driving shaft is turned, so as to shift said free trunnion further from said shortest line between said axes of hinge movement, a driven shaft, a. plate on said driven shaft within said casing, said plate having a projection with recess formed with radial walls, embracing said levers, said walls mg surface, said segments being relatively selectively engaging one or the other-of said levers, depending upon the directionin which 1 it is attempted to turn said driven shaft, swinging said lever's slightly, so as to move said free trunnion toward said shortest line between said axes of binge movement, exerting a toggle action which binds said segments against said bearing surface, immoby free trunnionssuitably received in curved bearing surfaces formed on' said segments and said levers.

3. Irreversible bi-directional transmission device as claimed in claim 1', the segments be- 'ing formed with recesses upon those faces in contact with the driving shaft plate, and the latter being formed with studs received'in ,said recessesfor limiting the amount of displacement of said segments relative to said plate.

4. Irreversible bi-directional transmission mechanism including a fixed clutch element comprising a cylindrical bearing surface,

free clutch shoes adapted to bind against said surface, means forming a free toggle joint between said clutch shoes for spreading them into binding engagement with said fixed clutch element, free levers for operating said toggle joint, a driving and a driven shaft, said free elements being rotatable with said driving and driven shafts when said toggle joint is in loose position and means connected resgectively with said driving and driven s afts and acting respectively on 'opposite sides of said free levers.

In testimony whereof I have signed 111 name to this specification.

RAYMOND PETIT, 

